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3 years ago

I really need help on this

Mathematics

2 answers:

Sonbull [250]3 years ago

7 0

Answer:

6+6=12cm

Step-by-step explanation:

diameter=2r

diameter=2*6

diameter =12cm

ehidna [41]3 years ago

4 0

Answer:

12 cm

Step-by-step explanation:

diameter=2×radius=2×6=12 cm

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Step-by-step explanation:

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3 years ago

Math question ^^^ please help

Nookie1986 [14]

$(\frac{g}{f})(3)=\frac{-13}{21}\\$

2/3 will not be included in the domain of g/f

Step-by-step explanation:

Given functions are:

$g(x) =-2x^2+5\\f(x)=9x-6$

We have to calculate (f/g)(x) first

The steps will be as follows:

$(\frac{g}{f})(x)=\frac{g(x)}{f(x)}$

Putting the values of functions

$(\frac{g}{f})(x)=\frac{-2x^2+5}{9x-6}\\We\ have\ to\ find\ the\ value\ of\ (\frac{g}{f})(x)\ at\ 3\\So,\\(\frac{g}{f})(3)=\frac{-2(3)^2+5}{9(3)-6}\\(\frac{g}{f})(3)=\frac{-2(9)+5}{27-6}\\(\frac{g}{f})(3)=\frac{-18+5}{27-6}\\(\frac{g}{f})(3)=\frac{-13}{21}$

Domain of g/f:

$(\frac{g}{f})(x)=\frac{-2x^2+5}{9x-6}$

The function will be undefined if the denominator is zero.

To find the domain we will put the denominator equal to zero

So,

$9x-6=0\\Adding\ 6\ on\ both\ sides\\9x-6+6=0+6\\9x=6\\Dividing\ both\ sides\ by\ 9\\\frac{9x}{9}=\frac{6}{9}\\x=\frac{2}{3}$

Hence, the function will be undefined on x=2/3 so 2/3 will not be included in the domain of (f/g)(x)

Answer:

$(\frac{g}{f})(3)=\frac{-13}{21}\\$

2/3 will not be included in the domain of g/f

Keywords: Domain, Operations on Functions

Learn more about functions at:

#LearnwithBrainly

8 0

3 years ago

I need help.. 1. 4(7p+8) 2.-7(2+8s) 3.-8(-6d+3)

Advocard [28]

1. 28p + 32

2. - 56s - 14

3. 48d - 24

#thanks for the points!

#Chloe919 

#carry on learning

8 0

3 years ago

Write the following as an expression or equation 10 less than the product of a number and four

ehidna [41]

10 - 4x

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7 0

3 years ago

21 A stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. How long are the two pi

Hunter-Best [27]

Answer:

2.33 inches and 4.66 inches

Step-by-step explanation:

2x+x=7 or 3x=7

divide by three and x =2.33

that's for the first one and the second one is twice the size so it'll be 4.66 inches

3 0

3 years ago

Read 2 more answers